Do you argue with strangers on the internet? (I plead the fifth). Even if you have enough self-control not to engage most arguments and comment sections, chances are high that you think through how you would argue with them if you weren’t fairly certain they are a troll in an alternate universe. Also if your mother wasn’t your friend on Facebook.
Are you leveraging those thoughts? Or just rehearsing them, allowing yourself to feel irritated and angry? Put that energy to good use for your writing. Your next character is hiding in the comments section of nearly any forum. Here’s how to find him or her.